grove



No. 6|4,463. Patented Nov. 22, |898. D. GROVE.

BAKING OVEN.

(Application med May 16. 15598.)

2 Sheets-Sheet I.

(No Model.)

me Nonms mans cn. Fumo-uma. wAsmNs-rcn, D. c

om 9 olo 21 2 V. o N. d e t n e .t a P .m WV .U0 nnG GN .K DA B 3. 6 47M 6 0.. N

(Application filed May 10, 1898.)

2 Sheets-Sheet 2.

(No Model.)

FIGB.

MWC

vNrrnn @STATES ATENT BAKlNc-ovEN. v

SPECIFICATION forming part of Letters Patent No. 614,463, dated November22, 1898.

Application iiled May 10, 1898. Serial No. 680,252. (No model.)

To @ZZ whom, t may concern:

Be it known that I, DAVID GROVE, a subject of the Emperor of Germany,and a resident of No. 24 Friedrichstrasse, Berlin, in the Empire ofGermany, have invented certain new and useful Improvements in Baking-Ovens, of which the following is an exact, full, and clear description.v

This invention relates to a baking-oven provided with an innerheating-body for heating the air in the oven and with two or morehearth-plates arranged one above the other, preferably withdrawable andreplaceable and between which are arranged plates acting as intermediateheating-bodies which are capable of adjustment. Such intermediateplates, on account of their radiating heat in conjunction with an upperradiating-sheet in the oven, cause the loaves or pastry on thehearthplates to be sufficiently and uniformly heated above and below.The bottom hearth-plate, situated next to the heating-body, ispreferably provided with partitions which act as heating-ribs andthoroughly bake the sides of the loaves, whereas the intermediate orupper plate is formed of a sheet provided with holes or slots, so thatthe radiating heat of the intermediate heating-body acts upon the bottompart of the loaves on the upper or intermediate hearth-plate and at thesame time also heats the upper part of the loaves on the hearth-platebeneath same.

Referring to the accompanying drawings, Figure l is a cross-section ofan oven with two hearth-plates lying one above the other. Fig. 2 is alongitudinal section through the same. Fig. 3 is a front end elevation,and Fig. 4 is a plan of the partly-broken hearth-plate.

The bakingoven comprises in a known manner a preferably ellipticalcasing or shell a, closed all round, which is formed of an outer plainand an inner corrugated sheet, between which a suitable materialpreventing the radiation of heat is provided. In the bottom part of theoven is arranged the heating-body b, fed from without with fuel andcommunicating with the chimney, such body heating the air within thecasing or shell a. Vertical supports c c', which are secured within thecasing by means of rivets or in any other similar manner, are adaptedfor carrying or supporting the hearth-plates d e. These hearth-platesare iirmly connected with crosssupports j', whose lateral trunnions g,provided with rollers, run in U-shaped guiderails h, which may beadjusted at any desired height. For this purpose the supports c c haveholes through which pass the securing bolts or pins for the rails h.

The bottom hearth-plate CZ is formed of two sheets with interposedpacking of insulating material, such as asbestos, fossil-meal, or thelike. The lateral edgesare bent upward and by correspondingly bendingthe divided upper sheet intermediate longitudinal ribs or ledges d areformed, which serve as heatingribs for also heating the ends of theloaves adjacent to the ribs. Such a bottom hearthplate divided bypartitions is of special advantage for baking-ovens in which squareloaves are to be baked. In some cases-for instance, for baking roundloavesthe intermediate ribs d may be entirely dispensed with.

The upper hearth-plate eis formed of a slotted or perforated sheet e',which is secured at its edges to rails or angle-iron e2 and employing anintermediate layer e3 of insulating material-forinstance,asbestosandpreferably divided in the center for eventually changing the width ofthe hearth-plate. In this case of course the frame composed of themembers or parts e2 is also adjustable. The lateral edges of thishearth-plate are likewise bent upward at e4. The handles serve fordrawing out the plate e. Such handles are also provided on the bottomhearth-plate d. Between the upper and lower hearth-plates e and d,respectively, is provided a plain or preferably corrugated sheetmetalplate k, which is supported by cross-ties Z, whose longitudinal rails mare secured by means of holes and bolts to the supports c c', thuslikewise enabling the plate 1c to be adjusted at any desiredheight,according as the upper surfaces of the loaves on the lowerhearth-plate or the lower surfaces of the loaves on the upper perforatedhearth-plate are to be subjected to the radiating heat of theintermediate plate la becoming heated and consequently acting as aheating-body. In the upper part of the oven is arranged a plain orundulated radiating-sheet n, irmly secured to the casing or shell a,such sheet n radiating its heat toward the upper part of the loaves onthe upper hearth-plate. In View of this arrangement of the baking-oventhe loaves on several hearth-plates, being arranged one above the other,are thoroughly baked, since the hot air constantly circulates in theoven and is always reheated by the heating-body b after the heat hasbeen imparted to the loaves or hearth-plates and radiating-sheets k andn.

Instead of the two hearth-plates, which are arranged one above theother, as shown in the drawings, there may be employed, according to theheight of the oven, especially for special pastry, three or more plates,between which the adjustable intermediate heatingbodies are to beprovided. The baking-oven may be employed for stationary ortransportable purposes.

IIaving now particularly described and ascertained the nature of thesaid invention, I declare that what I claim, and wish to secure byLetters Patent, is-

1. In a baking-oven, the combination with the casing having aheating-body within the same at the bottom thereof, of the uprightstandards, the hearthplates carried thereby and the heating-platesupported by said standards between the hearth-plates, substantially asdescribed.

2. In a baking-oven, the combination with the casing, of theheating-body within the same, the upright standards, the railsadjustably carried by the standards, the hearthplates slidinglysupported by said rails, and a perforated plate located between thehearthplates and adjustably carried by the standards, substantially asdescribed.

In Witness whereof I have hereunto signed my name, this 27th day ofApril, 1898, in the presence of two subscribing witnesses.

DAVID GROVE.

XVitnesses:

FRANZ KOLLM, C. H. DAY.

